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Find basement waterproofing pros in Thornhill, Ontario

If you’re looking to protect your basement from leaks, floods, or humidity, HomeStars can help. Our platform allows you to easily connect with professionals who can help with basement waterproofing in Thornhill, Ontario. Compare quotes, read reviews, and make the hire all in one convenient place!

Closeup of a worker’s gloved hands waterproofing the bottom of a concrete wall with blue sealant.

Some of our top rated basement waterproofing specialists in Thornhill, Ontario

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  • Basement Waterproofing Specialist in Thornhill, Ontario
    • Best of the Best 2025
    • Best of Awards 2026

    About Canada Waterproofers Welcome to Canada Waterproofers — your trusted one-stop solution for waterproofing, plumbing, and drain repair services. With over 27 years of industry experience, we are committed to delivering exceptional workmanship, premium-quality materials, and reliable customer service on every project. At Canada Waterproofers, we understand that every home and property is unique. That’s why we take the time to properly assess each situation and provide customized solutions using the most effective products, methods, and applications available in the industry. For more than 27 years, we have proudly served homeowners throughout the Greater Toronto Area and surrounding communities, helping protect homes from water damage while ensuring plumbing and drainage systems function efficiently for years to come. ## Why Homeowners Choose Canada Waterproofers We believe that quality workmanship and durable materials are essential to getting the job done right the first time. Our team treats every customer’s home with the same care and respect as if it were our own. Whether it’s a complete basement waterproofing system or a minor plumbing repair, we approach every project with professionalism, honesty, and attention to detail. Canada Waterproofers is built on old-school values — integrity, transparency, hard work, and customer satisfaction. In an industry where careless workmanship and dishonesty can be common, we stand behind our reputation for dependable service and long-lasting results. We also believe in a hands-on, personalized approach. When you contact Canada Waterproofers, you won’t be dealing with a salesperson focused on simply selling a job. Instead, one of our experienced specialists will inspect your property, identify the source of the issue, and recommend the most practical and cost-effective solution for your home. Throughout every project, we keep our customers informed and involved so they fully understand the work being completed and how it benefits their property. ## Our Service Areas Canada Waterproofers proudly services homeowners across: * Toronto * Mississauga * Oakville * Burlington * Hamilton * Milton * Brampton * Vaughan * Richmond Hill * Markham * Ajax * Pickering * Whitby * Oshawa * Scarborough * Etobicoke * North York * And surrounding areas across the GTA ## Our Services We provide a full range of waterproofing, plumbing, and drainage solutions, including: * Exterior Waterproofing * Interior Waterproofing * Basement Leak Repairs * Foundation Crack Repairs * Sump Pump Installations * Battery Backup Sump Pump Systems * Backwater Valve Installations * Drain Repair & Replacement * Drain Snaking * Camera Inspections * Plumbing Services * Underpinning & Basement Lowering * Emergency Waterproofing Services * And More ## Benefits to Our Customers * 25-Year Transferable Warranty * Over 27 Years of Industry Experience * Fully Licensed & Insured * Full WSIB Coverage * Licensed Plumbers & Waterproofing Technicians * Building Renovator Licenses * Underpinning Specialists * Free No-Obligation Written Estimates * Competitive & Honest Pricing * Latest Industry Technology & Equipment * Repairs Completed Properly the First Time * We Only Repair What Is Necessary — Saving Homeowners Thousands ## Our Commitment At Canada Waterproofers, customer satisfaction is our highest priority. Before any work begins, we provide a free no-obligation written quote outlining the recommended solution and scope of work. Once the project is underway, our experienced technicians carefully monitor every stage of the process to ensure all work meets our strict quality standards. Our team takes pride in paying attention to even the smallest details because we believe nothing should be left to chance when protecting your home. As weather patterns continue to change and aging homes face increasing water and drainage challenges, Canada Waterproofers is ready to help. Our goal is to keep your basement dry, your foundation protected, and your plumbing systems operating properly for years to come. Choose Canada Waterproofers — where quality, honesty, and experience matter.

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  • Basement Waterproofing Specialist in Thornhill, Ontario

    Hello, I’m Georgii Shoniia, your trusted concrete specialist serving Kingston, Ontario, and surrounding areas! With over 10 years of experience in the concrete industry, I’m passionate about helping homeowners enhance their properties with durable, high-quality concrete solutions. Whether you need a new driveway, a stamped concrete patio, or foundation repairs, I bring expertise, precision, and a commitment to excellence to every project. I understand Kingston’s unique climate challenges—like harsh winters and humid summers—and ensure your concrete withstands the elements for years to come. My goal is to deliver exceptional craftsmanship while providing personalized service, ensuring your vision becomes reality. From small repairs to large installations, I handle it all with attention to detail and a focus on customer satisfaction. Let’s transform your home with concrete that’s built to last—contact me today for a free quote!

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  • Basement Waterproofing Specialist in Thornhill, Ontario
    • Best of Awards 2026

    Pro Quality is here for all your painting needs weather it be interior, exterior, commercial or residential we are here to ensure you get the job done right.

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  • Basement Waterproofing Specialist in Thornhill, Ontario
    • Best of Awards 2026

    Welcome to Design & Stone Hardscape, a leading hardscape company dedicated to transforming outdoor spaces into stunning, modern, functional environments. Based in Toronto/GTA, we specialize in interlock, concrete, excavating, landscape and water proofing. At Design & Stone Hardscape, our mission is to blend creativity, craftsmanship, and customer satisfaction in every Hardscape project. We believe in delivering durable and aesthetically pleasing outdoor solutions that stand the test of time. With a team of skilled professionals, we excel in a variety of hardscaping services, including patio installations, retaining walls, paver driveways, and outdoor living spaces. Our expertise lies in interlocking and we are equipped to handle projects of any scale. Quality is at the core of everything we do. From meticulous planning to the use of premium materials, we ensure that every hardscaping project meets the highest standards of craftsmanship. Our goal is to exceed your expectations and create outdoor spaces of your dreams. Our clients' satisfaction is our greatest achievement. Don't just take our word for it—read what our clients have to say about their experience with Design & Stone Hardscape. We take pride in turning their hardscape visions into reality. Give us a call - (437) 971-5966

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  • Basement Waterproofing Specialist in Thornhill, Ontario
    • Best of Newly Listed 2025

    Concrete Contractors Landscape Construction Pallotta Construction Ltd. was founded in 1977 and has a reputation for beautiful workmanship operating in the GTA and has maintained the same level of standards and service to this day. Paul Jr. oversees each job personally providing quotations and expertise on concrete, stonework, interlock, landscaping, waterproofing and drain. CONCRETE: A time-tested and true material, concrete can be used for the most high traffic areas around your home or formed into subtle outdoor accents. Driveways, curbs, sidewalks, accented porches or steps can all be poured and finished in a variety of ways. More industrial applications are also our speciality, from basement or garage floors to back entrances. We know concrete. Applications Driveways Patios Walkways Curbs Porches Steps Swimming Pool Decks Walkout Basements Garage Floors Basement Floors Slab on Grade INTERLOCKING: Give your driveway, steps, patio or walkway that time-worn feel of old Europe or turn your backyard into an elegant and relaxing space. Interlocking stone has no boundaries and gives us the ability to create an unlimited variety of geometric and random pattern designs. We are experts in the planning and installation of interlocking pavers, from traditional to modern. Applications Driveways Patios Walkways Entrances Retaining Walls Planters and Seat Walls Swimming Pool Decks Steps STONEWORK: Earthy in colour and undoubtedly the most natural and durable of choices. Traditional random patterns or clean square-cut stone for a more elegant appearance can give any patio or walkway a timeless appeal. Natural stone over a poured concrete base has proven to be the strongest and longest-lasting of materials. Applications Patios Walkways Curbs Swimming Pool Decks Overlays (over existing concrete porches or patios) Random Flagstone Square Cut Flagstone BUILD: With an extensive background in concrete construction, we have the tools and knowledge necessary for any concrete application. From lowering a basement to gain valuable living space, pouring a new concrete floor, building basement walkouts or repairing a foundation leak - Pallotta construction knows concrete! Applications Basement Lowering Basement Floors Basement Entrances (Walkouts) Underpinning Bench Footings Garage Floors Waterproofing Interior Membrane Weeping Tile Sump Pits/Drain Contact us today at 416-845-2562

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  • Basement Waterproofing Specialist in Thornhill, Ontario
    • Best of the Best 2024
    • Best of Awards 2024

    DRAIN...WATER...PLUMBING...WATERPROOFING ***** SERVICES ***** - DRAIN EMERGENCY'S !!! , - BLOCKED DRAIN !!! - PREVENT BASEMENT FLOODING !!! - BACK WATER VALVE INSTALLATION - DRAIN BACKUP PREVENTERS INSTALLATION - DRAIN BACKFLOOW PREVENTERS - DRAIN BACKFLOW VALVES - LEAD WATER PIPE REPLACEMENT !!! - LOW WATER PRESSURE? - LEAD WATER PIPE REMOVAL !!! - INCREASING WATER PRESSURE, - DRAIN SNAKING / CLEANING, - DRAIN ROOTER, - DRAIN VIDEO CAMERA INSPECTION, - EMERGENCY DRAIN/SEWER - UNCLOGGING/SNAKING , - DRAIN / SEWER - UNDERGROUND - “HOUSE INSPECTIONS” - TREE ROOTS REMOVAL FROM DRAIN PIPE, - PLUGGED DRAINS, - EMERGENCY DRAIN SERVICE / REPAIR , - DIGGING DRAINS INSIDE BASEMENTS, - EXCAVATING SEWER OUTSIDE, - DRAIN PIPE REPAIRS , - NEW DRAIN PIPES INSTALLATION , - DRAIN / SEWER PREVENTIVE MAINTENANCE , - FLOOR DRAIN INSTALLATION, - UNDERGROUND DRAIN/SEVER ACCESS POINT - INSTALLATION For Drain Video Inspections, - SUMP PUMPS & SUMP PUMP PITS INSTALLATION , - BATTERY BACKUP SUMP PUMPS SYSTEMS - SEWAGE EJECTOR INSTALLATION , - BASEMENT WALLS WATER PROOFING , - DRAIN PIPE REPLACEMENT , - DRAIN/SEWER CLEANING , - FRENCH DRAIN INSTALLATION.

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  • Basement Waterproofing Specialist in Thornhill, Ontario

    At Precise King Contracting Service, we take pride in transforming spaces into seamless works of art. As your premier drywall and home renovation experts, we bring a wealth of experience, unmatched craftsmanship, and a commitment to excellence to every project. Our skilled team of professionals excels in the delicate art of drywall installation and taping. From new constructions to renovations, we approach each job with precision, ensuring a flawless finish that stands the test of time. We understand the impact a well-executed drywall job can have on the aesthetics and functionality of a space. Whether it's a residential haven, commercial hub, or industrial facility, we have the expertise to enhance the beauty and structural integrity of your property. We value your time, and our commitment to punctuality is non-negotiable. Our team works diligently to complete projects within agreed-upon timelines, without compromising the quality that defines our work.

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  • Basement Waterproofing Specialist in Thornhill, Ontario
    • Best of Awards 2026
    • Best of Newly Listed 2025

    Agis Construction and Landscaping specializes in landscaping, interlocking concrete pavement systems, segmental retaining walls and steps, permeable paving technology, interlocking stone and clay pavers, excavation and drainage solutions, woodwork (sheds, fences, decks), and welding. Our separate line in business focuses on vynil pools construction from end to end providing affordable yet long term solutions for in ground swimming pools. Our team of experienced, passionate and resourceful experts will ensure to tailor your projects to your needs and desires. Whether they are repairs or complete renovations, we will ensure to adhere to your expectations. Some of the services Agis Construction and Landscaping provides: 1. Interlocking design to help you explore possibilities Agis will provide options with sketches for clients and tailor solutions based on client expectations and needs. If required, Agis could also offer 3D designs for the clients for higher visuals. 2. Paver landscaping to provide durable and long term solutions Stone can be man made or natural made. Agis expertise and knowledge will ensure to cover all the major to ensure a successful interlocking stone installation 3. Interlocking driveway withholding heavy car traffic areas and still beautiful design Base is the key. Proper excavation and compaction will ensure long term durability of the interlocking driveway. Agis team can assist you with different modern solutions and designs that will provide comfort and stability years to come 4. Interlocking patio and decks Similar to driveways, patios are places where we spend most our time at. Agis will ensure to provide with a variety of features and services that start from simple patio re-level to a patio with pergola, kitchen bar and fire pit and shed. 5. Interlocking or ready mix walkways and steps Convenient and yet simple, walkways and steps make our lives easier. Agis can provide multiple options for clients in regards to walkway installation methods and designs. 6. Fences and gates Agis can help repair, refinish, or build various types of fences to match your needs. Wooden, stone or concrete wall or fence is a great way to ensure privacy 7. Welding Agis provides flux core welding and installs corten steel landscape elements and fire places from corten steel for your living room. Very modern and cool way to renovate your home. 8. Maintenance Agis helps clients with maintenance activities and assist in executing various maintenance tasks around your landscape, trees and shrubs. 9. Repairs

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  • Basement Waterproofing Specialist in Thornhill, Ontario

    We are bringing 30 years of construction experience to your door. We offer services in various areas of construction such as masonry, concrete, roofing, fence, and building gazebo. We provide services ranging from repairs to building new things, and can travel to various locations in Ontario; if you are nearby, wr can visit you, if not we can provide you a quote over over the phone. Also your job will be guaranteed.

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  • Basement Waterproofing Specialist in Thornhill, Ontario

    Versatile Handyman & Fence Builder – Concrete Specialist With a passion for construction and a commitment to quality, I offer a wide range of services, including fence installation, concrete work, and general maintenance. Whether it's building sturdy fences, pouring durable concrete foundations, or handling various repair tasks, I bring precision and reliability to every project. Core Services: Fence Installation & Repair: Expert in constructing and repairing fences using wood, vinyl, chain link, and concrete materials. Proficient in setting posts, aligning panels, and ensuring structural integrity. Concrete Work: Skilled in mixing, pouring, and finishing concrete for foundations, walkways, patios, and more. Experienced in using tools like power vibrators, trowels, and screeds to achieve smooth, level surfaces. General Handyman Services: Capable of handling a wide range of tasks, including minor repairs, furniture assembly, and other construction-related jobs. No job is too small or too big.

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  • Basement Waterproofing Specialist in Thornhill, Ontario

    At High Country Construction, we bring over 10 years of experience and a commitment to quality you can count on. we take pride in delivering honest, reliable work on every job, big or small. Whether it's a full home renovation, a custom build, or general improvements, we approach each project with care, clear communication, and attention to detail. Proudly serving our local community with craftsmanship that stands the test of time. Lets make your dreams a reality!

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  • Basement Waterproofing Specialist in Thornhill, Ontario

    We are extremely qualified in residential and light commercial construction

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  • Basement Waterproofing Specialist in Thornhill, Ontario
    • Best of the Best 2025
    • Best of Awards 2026

    ⚠️ PLEASE CONTACT US DIRECTLY ⚠️ For the fastest response and best overall experience, we strongly recommend contacting Call Nelson Landscaping / CNL HARDSCAPES directly through Google, Instagram, Facebook, or our website rather than through the HomeStars request system. Many homeowners view our profile but still submit requests through the platform, which can delay communication and reduce the ability for us to properly discuss your project details from the beginning. Direct contact allows us to: • Respond faster • Better understand your project goals • Discuss realistic budgeting and scope • Determine if your project is a good fit for both sides • Provide a smoother overall consultation process We continue to maintain our HomeStars profile because of our past client reviews, project history, and long-standing reputation within the industry. We appreciate your support and look forward to helping bring your project to life

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  • Basement Waterproofing Specialist in Thornhill, Ontario

    Welcome to SMYRNA Construction – Your Premier Choice for Outdoor Excellence in the Greater Toronto Area and Beyond! About Us: With a legacy spanning many successful years, SMYRNA Construction is a seasoned leader in the construction industry. Specializing in interlocking stone, decks, fences, and porch builds, we have transformed countless outdoor spaces, making homes shine with our expert craftsmanship. Service Areas: While based in the Greater Toronto Area, we proudly extend our services to Barrie, Hamilton, Durham Region, Ajax, and Pickering. Our team is dedicated to enhancing the beauty of homes across these regions, delivering top-notch quality with every project. Comprehensive Outdoor Solutions: SMYRNA Construction takes pride in offering a wide array of outdoor services. Whether it's interlocking stone pathways, stunning decks, robust fences, or porch builds that you desire, we have the expertise to turn your vision into reality. Attention to Detail and Quality: At SMYRNA Construction, attention to detail is our hallmark. We believe in infusing each project with precision and unmatched quality. Our skilled team ensures that every element, from design to execution, reflects our commitment to excellence. Commercial and Emergency Services: SMYRNA Construction is equipped to handle both commercial and emergency requests. Whether it's a business space or a last-minute repair, our responsive team is ready to deliver prompt and reliable solutions, making your outdoor project stress-free. Exclusive Offer: Take advantage of our commitment to customer satisfaction with a 10% discount on your quotes. We believe in providing value while ensuring that your outdoor dreams come to life within budget. Free Quotes and Estimates: Curious about the cost of transforming your outdoor space? Contact us today for a free quote and estimate. SMYRNA Construction is dedicated to transparent communication, helping you plan your project with clarity and confidence. Experience the SMYRNA difference – where customer satisfaction, attention to detail, and top-tier quality converge to create outdoor spaces that truly shine. Contact us for a consultation and let's bring your vision to life!

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  • Basement Waterproofing Specialist in Thornhill, Ontario

    For over 70 years, residential, industrial and commercial clients in Toronto and the surrounding areas have trusted Anthony Paving Co. Ltd. for affordable and efficient paving services. Anthony Paving has provided paving solutions to homes, businesses, playgrounds and properties throughout the area, and will bring its decades of experience to your next paving project! No project is too large or too small for our friendly team. Anthony Paving begins each job with a free estimate and a written guarantee. Call us now to speak to our friendly team!

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4.7

Top rated Basement Waterproofing Specialists

Our Basement Waterproofing Specialists in Thornhill, Ontario, are rated 4.7 out of 5 based on 45 reviews from homeowners like you.

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Easily find verified local pros. Just post your job to get quotes from pros near you across Canada.

What basement waterproofing services are available in Thornhill, Ontario?

Pros can waterproof basements from the interior, the exterior, or using a combination of techniques. The right service depends on whether you need full waterproofing or just touch-ups.

Here are some common basement waterproofing services in Thornhill, Ontario:

  • Installation of interior drainage systems: a perimeter drain installed along the interior footing collects and redirects water to a sump pit for removal.
  • Sump pump installation and replacement: often handled by a [plumber](https://www.homestars.com/plumbing/plumber-pros/Thornhill, Ontario), a pump installed in the sump pit removes accumulated groundwater and directs it away from the foundation.
  • Exterior waterproofing: excavation around the foundation allows for membrane application and drainage board installation to block water at the source.
  • Crack injection: epoxy or polyurethane foam is injected directly into foundation cracks to seal them against water intrusion.

No matter your needs, it’s easy to find basement waterproofing pros near you who can help. Just post your project on HomeStars now, and available contractors in your area can reach out!

What are the average costs of basement waterproofing pros in Thornhill, Ontario?

Basement waterproofing costs vary widely depending on the method, the size of the foundation, and where repairs are concerned, the extent of the damage. Labour typically runs between $50 and $150 per hour, depending on the service and complexity of the job. Materials and equipment, such as excavation machinery, may add additional costs.

Typical costs for common basement waterproofing services in Thornhill, Ontario:

  • Installation of interior drainage systems: between $3,000 and $10,000 for a full perimeter system in an average-sized basement
  • Sump pump installation and replacement: between $500 and $2,000 depending on pump type and whether a backup system is included
  • Exterior waterproofing: between $10,000 and $30,000 depending on foundation size and depth of excavation required
  • Crack injection: between $300 and $800 per crack depending on length, depth, and material used

HomeStars tip: To ensure you get the most accurate costs for Thornhill, Ontario, make sure to get everything written down in an itemized quote. This avoids misunderstandings and supports transparency and clear communication for both you and the contractor.

How to find basement waterproofing specialists in Thornhill, Ontario with HomeStars

Finding a basement waterproofing pro in Thornhill, Ontario can feel overwhelming, especially when water damage requires prompt attention. HomeStars makes it easy to connect with the right pro for your project. Just follow these simple steps:

  1. Start by posting your project. Provide a clear description of your basement waterproofing needs and, if possible, include photos to get precise quotes.
  2. Receive offers from available pros, review work history, and read customer feedback for basement waterproofing in Thornhill, Ontario.
  3. Connect with basement waterproofing specialists in Thornhill, Ontario to discuss your project, request and compare quotes, and ask any questions.
  4. Hire the right pro to get the job done and leave a review based on your experience.

HomeStars tip: Once your project is done, make sure to leave a review. Our review system ensures that pros are rewarded for good work and held accountable for any problems.

Pros on HomeStars undergo checks at registration – such as ID documents, company details, and certifications for regulated jobs and skill assessments – allowing you to hire with confidence.

Extra peace of mind with the HomeStars Confidence Program

The HomeStars Confidence Program is designed to give you added confidence when hiring through our platform. If your job qualifies under the Program and we determine that a claim meets the Program requirements, HomeStars may cover what you owe the Pro on an eligible job with a quote of up to CAD $10,000, in line with our terms and conditions.

FAQ: Common questions about basement waterproofing in Thornhill, Ontario

How long does basement waterproofing last in Thornhill, Ontario?

Most professional waterproofing solutions in Thornhill, Ontario are designed to last 10 to 25 years depending on the method used and the quality of installation. Sump pumps typically require replacement every 7 to 10 years.

Will waterproofing fix existing mould in my basement?

Waterproofing addresses the source of moisture but will not remove mould that has already formed. A separate mould remediation service is typically required before or after waterproofing work is completed.

What if my basement waterproofing project in Thornhill, Ontario requires excavation?

Exterior waterproofing projects in Thornhill, Ontario often require excavation around the foundation, which adds complexity, time, and cost to the overall job. It is important to work with pros who can coordinate this process effectively. [Local excavation specialists](https://www.homestars.com/gardening-outdoors/excavation-specialist-pros/Thornhill, Ontario) are available on HomeStars to walk you through what to expect and collaborate with your preferred basement waterproofing pro.

Does homeowner insurance cover basement waterproofing in Thornhill, Ontario?

In most cases, standard home insurance policies do not cover waterproofing as it is considered a maintenance issue rather than sudden damage. However, water damage resulting from a specific event such as a burst pipe may be covered. It is worth reviewing your policy or speaking with your insurance provider for clarification.

How do I know if a basement waterproofing pro is right for my project?

Not all waterproofing projects are the same, and finding a pro with the right experience for your specific situation is important. Reading reviews from homeowners who have had similar work done can help you make a more informed decision. Browse basement waterproofing pros on HomeStars to compare ratings and reviews from real homeowners in Thornhill, Ontario.

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